Support trainer



FIG. 1 is a perspective view of a support trainer showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The dashed lines in the drawings represent stitching and form no part of the claimed design. The broken lines in the drawings illustrate portions of the support trainer that form no part of the claimed design. 

CLAIM The ornamental design for a support trainer, as shown and described. 